package com.hong.concurrent.chapter14;

import java.util.Random;
import java.util.concurrent.CountDownLatch;
import java.util.stream.IntStream;

/**
 * @Author csh
 * @Description jdk自带守护线程
 * @Date 2018/7/9 21:42
 */
public class JDKCountDown {
    private static final Random random = new Random(System.currentTimeMillis());

    public static void main(String[] args) throws InterruptedException {

        final CountDownLatch latch = new CountDownLatch(5);

        System.out.println("准备多线程处理任务.");
        //The first phase.

        IntStream.rangeClosed(1,5).forEach(i->
            new Thread(()->{
                System.out.println(Thread.currentThread().getName()+" is working.");
                try {
                    Thread.sleep(random.nextInt(1000));
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                latch.countDown();
            },String.valueOf(i)).start()
        );

        latch.await();

        //The second phase.
        System.out.println("多线程任务全部结束，准备第二阶段任务");
        System.out.println(".....................");
        System.out.println("FINISH");
    }
}
